6.31.10. IA-64 Function Attributes

6.31.10 IA-64 Function Attributes

These function attributes are supported on IA-64 targets:

syscall_linkage

This attribute is used to modify the IA-64 calling convention by marking all input registers as live at all function exits. This makes it possible to restart a system call after an interrupt without having to save/restore the input registers. This also prevents kernel data from leaking into application code.

version_id

This IA-64 HP-UX attribute, attached to a global variable or function, renames a symbol to contain a version string, thus allowing for function level versioning. HP-UX system header files may use function level versioning for some system calls.

extern int foo () __attribute__((version_id ("20040821")));

Calls to foo are mapped to calls to foo{20040821}.

© Free Software Foundation
Licensed under the GNU Free Documentation License, Version 1.3.
https://gcc.gnu.org/onlinedocs/gcc-7.1.0/gcc/IA_002d64-Function-Attributes.html

在线笔记
App下载
App下载

扫描二维码

下载编程狮App

公众号
微信公众号

编程狮公众号

意见反馈
返回顶部